Abstract: Taking the SB pump room well sinking at Shanghai Pudong as engineering background, close up photogrammetry has been applied to measuring the displacements in the process of large scale well sinking at first by establishing the digit PHOTO analysis system. Dynamic graphical display of information for multi computer users, including the displacement and deflexion and 3D status of well sinking, has been carried into effect under Auto CAD and Matlab software system environment. The measured results were adopted in situ. It makes well sinking engineering to achieve goal of preventing the deflexion,rectifying a deviation,improving construction method and assuring engineering quality. It provide the experience for the auto monitoring of other well sinking in the future.